Amphoteric

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Rachael_1H
Posts: 31
Joined: Fri Sep 25, 2015 3:00 am

Amphoteric

Postby Rachael_1H » Tue Nov 24, 2015 10:26 am

Hello,

"state whether the following oxides are acidic, basic, or amphoteric:
As2O3 and Bi2O3."

The answer key states that they are both amphoteric. How would we know this?
Please explain. Thanks.

Chem_Mod
Posts: 18693
Joined: Thu Aug 04, 2011 1:53 pm
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Re: Amphoteric

Postby Chem_Mod » Tue Nov 24, 2015 11:46 am

Oxides of the semimetal elements (in the zigzag on the periodic table) and the elements right below a semimetal tend to be amphoteric.


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